Cultivator.



UNITED srarns PATENT "orrion.

,cuLTwATor-z.

Silvacifieatioii of Letters Patent. V

Eatented Sept. 11,1906.

Aitu ammm'i el 17,1905. Serial 1%. 312.190.

T0 a.l7 whom itmwy con-cern:

' Beit known thatI,

of Iowa, have invented new and useful Improvements in Cultivators, jofwhich the, following is a specification. y This invention relates to cultivators, the object'of the invention being to provide a r0- tary cultivator or, in-othe'r words, a cultivator embodying a rotary disk which carriescoinbined cutting and cultivating teeth, "which in the operation of the cultivator as a whole act to cut weeds, stalks, and the like and also to cultivateand pulverize the soil, leaving the earth in splendid condition for planting vseed and for receiving moisture, thusdoingaway with the necessity of sub sequently running a harrow or. plow over the ground previously acted uponby the .cul tivator.

A further objectof the invention is to provide means for adjusting'the depth of penetration of the cutting and cultivating teeth. 1 With the above-and other objects in view, the nature of which will'more fully appear as the description proceeds, the invent on consists in the nove construction, combination,

and arrangement of parts hereinafter more fully described, illustrated, and claimed.

ln'the accompanying; drawings, Figure 1 is a sectional-side elevation'of a cultivator embodying the present invention. Fig. 2 is a cross-section through'the same, taken in line 'with' the shaft of the cylinder. Fig. 3 is a detail side elevation showing a"por tion of the cylinder-adjustingmechanism.v Fig. 4 is a cross-sectional-view of one of the cutting and'cultivatin teeth. Fig. 5 is a detail view to turn on a short curve'.-.

showing .1 the c utc'hed engagement between the main driving-sprocket and the main driving-shaft of themachine.

he machin f'in 'tsgeneral organization co'mprises,=- essentially, the oppositelyarrangedside frame-bars 1 connected together and braced in an suitable mannerto form the mainframe o the machine, the rear end .of saidframe being supported upon the axle which carries the main driverwheels 3, while the forward end of the frame is recessed underneath, as shown at 4, and mounted upon a front truck 5, the wheels of which are adapted to turn under the body of the frame, so as to allow the machine as a whole 6 designates .the

, I draft--pole"-or tongue WILLIAM Tnotin- SON, a citizen .of the United States, residing.

- iat Comin in the county of Adams and Stateside frame thumb-late the cylinder up and own by means of the connected to the forward truckfi carrying'out the present invention the bars 1 are provided with oppositely-arranged vertical slots 7, in which is movable up anddown the shaft 8 of a cylinder 9, prov1ded-with a multiplicity of cutting and cultivatin teeth 10,. extending radially outward thereflom, as clearly shown'in-Figs. 1 and 2. The cylinder 9 is hollow, as shown in Fig. 2, and provided at its opposite ends with the heads or closures 11 to exclude dirt and provide for suitably mounting the cylinder fast on the shaft 8. Each of the teeth 10 is substantially triangular in cross section, as

shown in Fig. 4, or, in other words, comprises the forward cutting ed e 13 for severing Weeds and the likeand t e rearwardlydiverging and concave side walls 12 and 14, which terminate in a broad'base or back 15, which 0 erates tolift, disintegrate, and pulverize t e soil after the same. has been divided by the cutting edge 13. This leaves the soil in splendid condition to receive the .seeds and moisture and to permit the sprouting of the seeds without packing the earth over the same.

The shaft 8 is mounted in sliding boxes 16, movable up and down in the slots 7 by means of rack-bars 17, extending upward at oppo site sides of the frame, as shown in Figs. 1- and 2 and meshing with gear-wheels 18, mounted fast on'a common shaft 19, jour' naled in bearings 20 on a superimposed seat 21. for the driver. The shaft 19 is also pro- 'vided' with a ratchet-wheel 22, with which a pawl 23 en a es, saidpawl being carried by a lever 24,. rovided for adjusting connections just described. 25 desi nates a detent which engages the ratchet-wheel 22 to hold the cylinder at an desired elevation after the same has been a iusteda The rack-bars 17 are steadied by suitable guides 26 on the machine-frame. The cylinder is driven by providing the shaft 8 thereof with sprocket-wheels 27 and ass-. ing a sprocket-chain 28 from said w eels around driving sprocket-wheels 29, fast on i the axle 2. The Wheels 3 constitute traction-wheels which drive'the cylinder in the manner readily understood.

30 designates a foot-rest for the driven. and 31 and 32 designate covers 01' guards in the form of plates which extend over" the oblique braces 33 and 34, which extend from the main frame of the machine upward and yform supports for the drivers seat 21.

In order to provide for backing machine Without operating the cylinder, the sprocketwheel 29is provided with a clutch-face 35, which, en ages a corresponding clutch-face 36 on the hu of the driving-wheel 3, the clutch- I faces being held inengagement bymeans'of a spring 37, exte'ndingaround theaxle 2. The teeth of the clutch-faces are so disposed that in the .inder. In the backward movement of the machine, however, the clutch-faces'slip past eaohother. ranged in spiral rows, which gives a better pulverizing action and -also renders the machine lighter in draft.

A cultivatorembodying a main frame supported atone end by traction-wheels and at forward movement, of the machine rotary motion is imparted to thesprocketwheel 29 and thence transmitted to the cyl- The'teeth 10 are preferably arsaid frame embodying side bars extending from the front to the rear wheels and'proand down in said slots andhaving the cylinder-shaft vjournaled therein, driving connectionsbetween the axle of the traction-wheels and the cylinder, means for adjusting the said boxes up and down,,and' a housing over said cylinder embodying a drivers seatboard, inclined braces extending forward and rearward therefrom and connected to.

the mainframe, and inclined grooves subported by said braces.

'3 vided with vertical slots, boxes adjustable up In testimony whereof I affix my signature in presence of two witnesses.

WILLIAM H. THOMPSON. Witnesses v I I I J. B. M NTGOMERY,

A. E. HULL. 

